tree 508ed71d35a6f675c87b5c584aa877b7bf296b67
parent c7552b09c2946a7d65de346b0a0f551f210edd4b
author Natalie Weizenbaum <nweiz@google.com> 1440545210 -0700
committer Natalie Weizenbaum <nweiz@google.com> 1440545210 -0700

Add an AuthenticationChallenge class.

A simpler version of this existed already in dart-lang/oauth2; this
makes it widely available and more robust.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1307353003 .